登录

<?php
    $conn = mysqli_connect('localhost','root','password','db_name') or die('数据库连接失败');
    $conn->query("SET NAMES 'UTF8'");
 
    $user = $_POST['user'];
    $pass = $_POST['pass'];
    $sql="SELECT * FROM users where user='{$user}' and pass='{$pass}'"; 
 
    $result=$conn->query($sql);
    $row = mysqli_num_rows($result);
    if($row == 1){
        echo $row['user']."登陆成功!";
    }
    else{
        echo"登录失败，请重新登录！";
    }    
?>